Kyotaro is a son of the "Godfather" who dominates half of the Japanese Yakuza groups, but was brought up by his mother. Now, Kyotaro in a high school. Together with his friends he forms a troop, similar to a gang group. They squeeze money from underground casino’s and nightclubs in their town. One Yakuza’s group is in the same territory as Kyotaro's tries to expel his troop. The story reveals how big ambition Kyotaro has.Original story by Hiroshi Motomiya.